/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/*
 Copyright (c) 2002-2009 ymnk, JCraft,Inc. All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

 1. Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright 
 notice, this list of conditions and the following disclaimer in 
 the documentation and/or other materials provided with the distribution.

 3. The names of the authors may not be used to endorse or promote products
 derived from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
 INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jcraft.jsch;

import java.text.SimpleDateFormat;
import java.util.Date;

/*
 uint32   flags
 uint64   size           present only if flag SSH_FILEXFER_ATTR_SIZE
 uint32   uid            present only if flag SSH_FILEXFER_ATTR_UIDGID
 uint32   gid            present only if flag SSH_FILEXFER_ATTR_UIDGID
 uint32   permissions    present only if flag SSH_FILEXFER_ATTR_PERMISSIONS
 uint32   atime          present only if flag SSH_FILEXFER_ACMODTIME
 uint32   mtime          present only if flag SSH_FILEXFER_ACMODTIME
 uint32   extended_count present only if flag SSH_FILEXFER_ATTR_EXTENDED
 string   extended_type
 string   extended_data
 ...      more extended data (extended_type - extended_data pairs),
 so that number of pairs equals extended_count
 */
public class SftpATTRS
{

	static final int S_ISUID = 04000; // set user ID on execution
	static final int S_ISGID = 02000; // set group ID on execution
	static final int S_ISVTX = 01000; // sticky bit ****** NOT DOCUMENTED *****

	static final int S_IRUSR = 00400; // read by owner
	static final int S_IWUSR = 00200; // write by owner
	static final int S_IXUSR = 00100; // execute/search by owner
	static final int S_IREAD = 00400; // read by owner
	static final int S_IWRITE = 00200; // write by owner
	static final int S_IEXEC = 00100; // execute/search by owner

	static final int S_IRGRP = 00040; // read by group
	static final int S_IWGRP = 00020; // write by group
	static final int S_IXGRP = 00010; // execute/search by group

	static final int S_IROTH = 00004; // read by others
	static final int S_IWOTH = 00002; // write by others
	static final int S_IXOTH = 00001; // execute/search by others

	private static final int pmask = 0xFFF;

	public String getPermissionsString()
	{
		StringBuffer buf = new StringBuffer(10);

		if (isDir())
			buf.append('d');
		else if (isLink())
			buf.append('l');
		else
			buf.append('-');

		if ((permissions & S_IRUSR) != 0)
			buf.append('r');
		else
			buf.append('-');

		if ((permissions & S_IWUSR) != 0)
			buf.append('w');
		else
			buf.append('-');

		if ((permissions & S_ISUID) != 0)
			buf.append('s');
		else if ((permissions & S_IXUSR) != 0)
			buf.append('x');
		else
			buf.append('-');

		if ((permissions & S_IRGRP) != 0)
			buf.append('r');
		else
			buf.append('-');

		if ((permissions & S_IWGRP) != 0)
			buf.append('w');
		else
			buf.append('-');

		if ((permissions & S_ISGID) != 0)
			buf.append('s');
		else if ((permissions & S_IXGRP) != 0)
			buf.append('x');
		else
			buf.append('-');

		if ((permissions & S_IROTH) != 0)
			buf.append('r');
		else
			buf.append('-');

		if ((permissions & S_IWOTH) != 0)
			buf.append('w');
		else
			buf.append('-');

		if ((permissions & S_IXOTH) != 0)
			buf.append('x');
		else
			buf.append('-');
		return (buf.toString());
	}

	public String getAtimeString()
	{
		SimpleDateFormat locale = new SimpleDateFormat();
		return (locale.format(new Date(atime)));
	}

	public String getMtimeString()
	{
		Date date = new Date(((long) mtime) * 1000);
		return (date.toString());
	}

	public static final int SSH_FILEXFER_ATTR_SIZE = 0x00000001;
	public static final int SSH_FILEXFER_ATTR_UIDGID = 0x00000002;
	public static final int SSH_FILEXFER_ATTR_PERMISSIONS = 0x00000004;
	public static final int SSH_FILEXFER_ATTR_ACMODTIME = 0x00000008;
	public static final int SSH_FILEXFER_ATTR_EXTENDED = 0x80000000;

	static final int S_IFDIR = 0x4000;
	static final int S_IFLNK = 0xa000;

	int flags = 0;
	long size;
	int uid;
	int gid;
	int permissions;
	int atime;
	int mtime;
	String[] extended = null;

	private SftpATTRS()
	{
	}

	static SftpATTRS getATTR(Buffer buf)
	{
		SftpATTRS attr = new SftpATTRS();
		attr.flags = buf.getInt();
		if ((attr.flags & SSH_FILEXFER_ATTR_SIZE) != 0)
		{
			attr.size = buf.getLong();
		}
		if ((attr.flags & SSH_FILEXFER_ATTR_UIDGID) != 0)
		{
			attr.uid = buf.getInt();
			attr.gid = buf.getInt();
		}
		if ((attr.flags & SSH_FILEXFER_ATTR_PERMISSIONS) != 0)
		{
			attr.permissions = buf.getInt();
		}
		if ((attr.flags & SSH_FILEXFER_ATTR_ACMODTIME) != 0)
		{
			attr.atime = buf.getInt();
		}
		if ((attr.flags & SSH_FILEXFER_ATTR_ACMODTIME) != 0)
		{
			attr.mtime = buf.getInt();
		}
		if ((attr.flags & SSH_FILEXFER_ATTR_EXTENDED) != 0)
		{
			int count = buf.getInt();
			if (count > 0)
			{
				attr.extended = new String[count * 2];
				for (int i = 0; i < count; i++)
				{
					attr.extended[i * 2] = new String(buf.getString());
					attr.extended[i * 2 + 1] = new String(buf.getString());
				}
			}
		}
		return attr;
	}

	int length()
	{
		int len = 4;

		if ((flags & SSH_FILEXFER_ATTR_SIZE) != 0)
		{
			len += 8;
		}
		if ((flags & SSH_FILEXFER_ATTR_UIDGID) != 0)
		{
			len += 8;
		}
		if ((flags & SSH_FILEXFER_ATTR_PERMISSIONS) != 0)
		{
			len += 4;
		}
		if ((flags & SSH_FILEXFER_ATTR_ACMODTIME) != 0)
		{
			len += 8;
		}
		if ((flags & SSH_FILEXFER_ATTR_EXTENDED) != 0)
		{
			len += 4;
			int count = extended.length / 2;
			if (count > 0)
			{
				for (int i = 0; i < count; i++)
				{
					len += 4;
					len += extended[i * 2].length();
					len += 4;
					len += extended[i * 2 + 1].length();
				}
			}
		}
		return len;
	}

	void dump(Buffer buf)
	{
		buf.putInt(flags);
		if ((flags & SSH_FILEXFER_ATTR_SIZE) != 0)
		{
			buf.putLong(size);
		}
		if ((flags & SSH_FILEXFER_ATTR_UIDGID) != 0)
		{
			buf.putInt(uid);
			buf.putInt(gid);
		}
		if ((flags & SSH_FILEXFER_ATTR_PERMISSIONS) != 0)
		{
			buf.putInt(permissions);
		}
		if ((flags & SSH_FILEXFER_ATTR_ACMODTIME) != 0)
		{
			buf.putInt(atime);
		}
		if ((flags & SSH_FILEXFER_ATTR_ACMODTIME) != 0)
		{
			buf.putInt(mtime);
		}
		if ((flags & SSH_FILEXFER_ATTR_EXTENDED) != 0)
		{
			int count = extended.length / 2;
			if (count > 0)
			{
				for (int i = 0; i < count; i++)
				{
					buf.putString(extended[i * 2].getBytes());
					buf.putString(extended[i * 2 + 1].getBytes());
				}
			}
		}
	}

	void setFLAGS(int flags)
	{
		this.flags = flags;
	}

	public void setSIZE(long size)
	{
		flags |= SSH_FILEXFER_ATTR_SIZE;
		this.size = size;
	}

	public void setUIDGID(int uid, int gid)
	{
		flags |= SSH_FILEXFER_ATTR_UIDGID;
		this.uid = uid;
		this.gid = gid;
	}

	public void setACMODTIME(int atime, int mtime)
	{
		flags |= SSH_FILEXFER_ATTR_ACMODTIME;
		this.atime = atime;
		this.mtime = mtime;
	}

	public void setPERMISSIONS(int permissions)
	{
		flags |= SSH_FILEXFER_ATTR_PERMISSIONS;
		permissions = (this.permissions & ~pmask) | (permissions & pmask);
		this.permissions = permissions;
	}

	public boolean isDir()
	{
		return ((flags & SSH_FILEXFER_ATTR_PERMISSIONS) != 0 && ((permissions & S_IFDIR) == S_IFDIR));
	}

	public boolean isLink()
	{
		return ((flags & SSH_FILEXFER_ATTR_PERMISSIONS) != 0 && ((permissions & S_IFLNK) == S_IFLNK));
	}

	public int getFlags()
	{
		return flags;
	}

	public long getSize()
	{
		return size;
	}

	public int getUId()
	{
		return uid;
	}

	public int getGId()
	{
		return gid;
	}

	public int getPermissions()
	{
		return permissions;
	}

	public int getATime()
	{
		return atime;
	}

	public int getMTime()
	{
		return mtime;
	}

	public String[] getExtended()
	{
		return extended;
	}

	public String toString()
	{
		return (getPermissionsString() + " " + getUId() + " " + getGId() + " " + getSize() + " " + getMtimeString());
	}
	/*
	 * public String toString(){ return (((flags&SSH_FILEXFER_ATTR_SIZE)!=0) ?
	 * ("size:"+size+" ") : "")+ (((flags&SSH_FILEXFER_ATTR_UIDGID)!=0) ?
	 * ("uid:"+uid+",gid:"+gid+" ") : "")+
	 * (((flags&SSH_FILEXFER_ATTR_PERMISSIONS)!=0) ?
	 * ("permissions:0x"+Integer.toHexString(permissions)+" ") : "")+
	 * (((flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0) ?
	 * ("atime:"+atime+",mtime:"+mtime+" ") : "")+
	 * (((flags&SSH_FILEXFER_ATTR_EXTENDED)!=0) ? ("extended:?"+" ") : ""); }
	 */
}
